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Patented Apr.--ll, I899.

T. W. GREEN ROTARY BLOWER (Application filed Jan. 9, 1899.)

3 Sheets-Sheet I.

.(No Modl.)

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Pate nted Apr. 11, I899.

T. w. GREEN.

ROTARY BLOWER.

(Application filed Jan. 9, 1899.)

(No Model.)

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WITNESSES:

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N5. 622,949. Patented Apr. 11, I899.

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ROTARY BLOWER.

(Application fllad In. 9, 1899.)

(No Model.) I 3 Shagts-Sheat-S.

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THE "cams PETERS 00,, rum-0411140., wAsmsumu, o. c.

TE STATES PATENT CFFICE.

THOMAS \V. GREEN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE WILBRAHAM BAKER BLOWER COMPANY, OF SAME PLACE.

ROTARY BLOWER.

sPEcIFicArioN forming part of Letters Patent No. 622,949, dated April 11, 1899.

Application filed January 9,1899. Serial No. 701,593. (No model.)

To (ZZZ whom-it may concern: O are two spiral discharge-ports in the Be it known that l, THOMAS WV. GREEN, a impeller similar to the intake-ports, but openeitizen of the United States, residing at Philain g outwardly and extending from the inside (lelphia, in the county of Philadelphia and of the impeller to the end opposite from the 55 State of Pennsylvania, have invented certain intake.

new and useful Improvements in Rotary c c aretwo spirally-formed webs connecting Blowers, of which the following is a specificathe central part of theimpeller with the outer tion, reference being had therein to the accircular part and separating the intake and companying drawings. discharge ports. 60 My invention relates to rotary pressure 11b and b b are four extensions formed on blowers or exhausters; and the object of my the impeller in the position shown in Figs. 3 improvement is to construct a blower that will and 4. The outer surfaces of the extensions 1) have a maximum capacity with a minimum' and b are made to conform to the curves deexpenditure of powerand at the same timedisscribed by the corners or angles of the semi- 65 charge the fluid acted upon in a steady and circular depressions in the revolving cut-off regular stream free from any pulsation. To valves, and thus form a lock or cut-off until accomplish the desired result, I construct the such times as the outer circular surfaces of blower with a single impeller that is open at the revolving cut-offs and the circular surboth ends and has therein intake and disfaces on the impeller meet. 70 2o charge ports separated by an intervening web 5 is the driving-shaft of the impeller.

portion, one end of said impeller communi-' D D are two revolving Valves or cut-oifs eating with the intake and the opposite end extending from end to end of the blower on of the impeller communicating with the disopposite sides of theimpeller B and parallel charge-opening in the blower. therewith. 7 2 5 In the accompanying drawings, Figure 1 is d d are the driving-shafts of the revolving an end elevation of my improved blower. cut-off valves D D. Fig. 2 is a horizontal sectional view of the (Z d are semicircular depressions formed blower on line 2 2 of Fig. 1. Fig. 3 is a verin the revolving cut-off valves and are made tical sectional View on line 3 3 of Fig. 1. to conform to the sweep of the impeller-wings 8o Fig. 4 is a vertical sectional view on line 3 3 a a. v

of Fig. 1, but with theimpeller turned about E is the driving-pulley on the shaft of the one-eighth of a revolution farther around in impeller.

the direction indicated by the'arrows. Fig. E E E are gear-wheels on the ends of the 5 is a horizontal section on line 5 5 of Fig. 3. driving-shafts of the impeller and revolving 85 3 5 Fig. 6 is a vertical section on line 6 6 of Fig. 3. cut-offs, respectively.

A represents the outer casing surrounding F F are two circular depressions or -chamthe working parts of the blower. bers formed in the two end plates AA around A A are the two end plates inclosing the the driving-shaft b and communicating with ends of the blower and forming supports for the open ends of the impeller. 90

the driving-shafts. d d d are journal-boxes for the driving- B is the impeller, located in the middle or shafts. central part of the blower and provided with A is the base portion of the blower undertwo extending wings or blades cm. The forneath and outside of the casing A. ward ends of these extending wings or blades a is a partition extending diagonally across 5 5 conform to the curve of the inside of the outer the base portion A and dividing it into the casing A and sweep the air therefrom into two triangular apartments 19 and b particuand through the discharge-ports. larly shown in Fig. 5.

G C are two spiral intake ports or ways exa a are rectangular channels or ways in tending inwardly from the intake end of the the end plates A, extending from the cir- I00 impeller and opening into the space inclosed cular depressions F F to and communicating by the outer casing A. with the triangular compartments and 12?.

B is the intake Communicating with the compartment 19 and B2 is the discharge-opening communicating with the compartment 19 The several parts of the blower being constructed and arranged as shown and a driving-belt secured upon the driving-pulley E, the operation of the machine is as follows: The movement of the driving-pulley E operates the impeller and gear-wheels E, E and E the impeller moving in the direction indicated by the arrows in Figs. 3 and 4. This movement of the impeller will causethe air to fiow in through the intake B into the chamber b and the passage-way a filling the circular depression or chamber F, from whence it passes through the intake-ports 0 into the space 0 inside of the casing of the blower. From-there it passes or is forced outwardly through the spiral discharge-ports G of the impeller into the circular depression or chamber F, out through the passage or channel a into the triangular chamber b ,and out at the discharge-opening B The intakeopenings in the one end of the impeller being at all times in communication with the chamber F and the intake channels or ways that lead to the open air and the dischargeopening at the opposite end of the impeller being at all times in communication with the chamber F, and the discharge-orifice, a continuous stream of air is pumped into and discharged out of the blower free from any pulsation or variation. The revolving cut-off valves D D prevent the air from being forced backwardly or churned around with the wings of the impeller.

Instead of making the intake-ports O and the discharge-ports C spiral in form they may chambers F F in the end plates A A maybe of any convenient shape and need not extend peller, but they must be large enough to permit the incoming and outgoing air to pass freely through them.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. A rotary blower having the impeller thereof provided with an intake and a discharge port, said intake and discharge ports openinginto opposite ends of the impeller and separated from each other by an intervening web portion, the intake-port registering with a chamber that communicates with the intake-opening and the discharge-port register ing with a chamber communicating with the discharge-opening, substantially as and for the purpose set forth.

2. A rotary blower having the impeller thereof provided with intake and discharge ports that communicate with each other through the space inclosed by the casingsurrounding the blower and separated from each other by an intervening Web portion; the intake-port opening into one end of the impeller and registering with an inlet on the end of the blower and the discharge-port on the opposite end of the impeller registering with a discharge-opening, substantially as shown and for the purpose described.

3. A rotary blower having therein a single impeller open at both ends and provided with two ports or channels extending inwardly in opposite directions from the ends, being sepa rated from each other by an intervening web portion; one of said ports registering with a chamber connected with the intake and the other of said ports opening into a chamber communicating with the dischargeopening, substantially as shown and for the purpose described.

4:. In a rotary blower,the impeller B, having therein inlet and discharge ports extending from the inner part of the impeller to opposite ends thereof and separated by an inter- I vening web portion and the inlet-opening F,

communicating with the intake and the outlet-opening F, communicating with the dis charge, in combination with the revolving cutoffs D, and D, located on opposite sides of the impeller and parallel therewith, substantially as shown and for the purpose described. be straight, if desired. The depressions or r 5. In a rotary blower the impeller B, having therein an inlet and a discharge port extending from the inner part of the impellerin opall of the way around the shaft of the imposite directions to the ends of said impeller and separated by an intervening web portion, in combination with the inlet-chamber F, passage-way a chamber b intakeopening B, the chamber F,'passage-wa y a, chamber Z2 discharge-opening B and the revolving cutoff valves D, and D, all arranged, substantially as shown and for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS WV. GREEN.

WVituesses:

Tr-ros. D. MowLDs, SAML. I-I. KIRKPATRICK. 

